保护蛋白质家族内的侧链动态
Anthony B Law1, Ernesto J Fuentes, Andrew L Lee
1Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
Journal of the American Chemical Society
|April 21, 2009
概括
蛋白质侧链动态令人惊地保持,即使在遥远的蛋白质亲属中. 这种与全球蛋白质折叠相关的灵活性,可能对蛋白质功能至关重要.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 生物物理学的生物物理.
背景情况:
- 蛋白质动态对于生物功能至关重要.
- 侧链运动发生在皮秒到纳秒的时间尺度上.
- 了解蛋白质动力学有助于药物设计和蛋白质工程.
研究的目的:
- 为了比较NMR监测的三个PDZ域的侧链运动.
- 为了研究蛋白质侧链动态的保存.
- 为了确定蛋白质动态是否可以从序列或结构中预测.
主要方法:
- 核磁共振 (NMR) 光谱学.核磁共振 (NMR) 光谱学.
- 甲基 (2) H 的放松测量.
- 计算侧链顺序参数 (S(2)).
主要成果:
- 侧链动态显示了PDZ域中具有低序列身份的显著保护.
- 观察到的动态比单独通过序列或局部包装预测的更相似.
- 同类蛋白质比目前基于结构的方法更好地预测了蛋白质动态.
结论:
- 快速的侧链动态是有组织的,并与全球蛋白质折叠联系在一起.
- 非局部相互作用和相关的运动影响侧链的灵活性.
- 保存的蛋白质动力学可能在蛋白质功能中发挥直接作用.
相关概念视频
Conservation of Protein Domains Over Different Proteins
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Conservation of Protein Domains
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Conserved Binding Sites
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Conserved Binding Sites
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Protein Dynamics in Living Cells
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Protein Folding
Overview


